Yeah, some spiritual experiences can be classified as psychiatric conditions. Normally, these conditions are not considered problems unless they interfere with life functionings or if they bother the person.
There is no spiritual world, so all spiritual experiences are occurring only in one's mind. Whether they're troublesome or not can depend on whether the observer agrees with the delusion or not. If a person's delusion aligns with the dominant religion of the area, then chances are good that most of the observers will not consider the delusions to be problematic.